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/*
*
* Copyright 2018 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include <grpc/support/port_platform.h>
#include "src/core/lib/iomgr/buffer_list.h"
#include "src/core/lib/iomgr/port.h"
#include <grpc/support/log.h>
#ifdef GRPC_LINUX_ERRQUEUE
#include <time.h>
#include "src/core/lib/gprpp/memory.h"
namespace grpc_core {
void TracedBuffer::AddNewEntry(TracedBuffer** head, uint32_t seq_no,
void* arg) {
GPR_DEBUG_ASSERT(head != nullptr);
TracedBuffer* new_elem = New<TracedBuffer>(seq_no, arg);
/* Store the current time as the sendmsg time. */
new_elem->ts_.sendmsg_time = gpr_now(GPR_CLOCK_REALTIME);
new_elem->ts_.scheduled_time = gpr_inf_past(GPR_CLOCK_REALTIME);
new_elem->ts_.sent_time = gpr_inf_past(GPR_CLOCK_REALTIME);
new_elem->ts_.acked_time = gpr_inf_past(GPR_CLOCK_REALTIME);
if (*head == nullptr) {
*head = new_elem;
return;
}
/* Append at the end. */
TracedBuffer* ptr = *head;
while (ptr->next_ != nullptr) {
ptr = ptr->next_;
}
ptr->next_ = new_elem;
}
namespace {
/** Fills gpr_timespec gts based on values from timespec ts */
void fill_gpr_from_timestamp(gpr_timespec* gts, const struct timespec* ts) {
gts->tv_sec = ts->tv_sec;
gts->tv_nsec = static_cast<int32_t>(ts->tv_nsec);
gts->clock_type = GPR_CLOCK_REALTIME;
}
void default_timestamps_callback(void* arg, grpc_core::Timestamps* ts,
grpc_error* shudown_err) {
gpr_log(GPR_DEBUG, "Timestamps callback has not been registered");
}
/** The saved callback function that will be invoked when we get all the
* timestamps that we are going to get for a TracedBuffer. */
void (*timestamps_callback)(void*, grpc_core::Timestamps*,
grpc_error* shutdown_err) =
default_timestamps_callback;
} /* namespace */
void TracedBuffer::ProcessTimestamp(TracedBuffer** head,
struct sock_extended_err* serr,
struct scm_timestamping* tss) {
GPR_DEBUG_ASSERT(head != nullptr);
TracedBuffer* elem = *head;
TracedBuffer* next = nullptr;
while (elem != nullptr) {
/* The byte number refers to the sequence number of the last byte which this
* timestamp relates to. */
if (serr->ee_data >= elem->seq_no_) {
switch (serr->ee_info) {
case SCM_TSTAMP_SCHED:
fill_gpr_from_timestamp(&(elem->ts_.scheduled_time), &(tss->ts[0]));
elem = elem->next_;
break;
case SCM_TSTAMP_SND:
fill_gpr_from_timestamp(&(elem->ts_.sent_time), &(tss->ts[0]));
elem = elem->next_;
break;
case SCM_TSTAMP_ACK:
fill_gpr_from_timestamp(&(elem->ts_.acked_time), &(tss->ts[0]));
/* Got all timestamps. Do the callback and free this TracedBuffer.
* The thing below can be passed by value if we don't want the
* restriction on the lifetime. */
timestamps_callback(elem->arg_, &(elem->ts_), GRPC_ERROR_NONE);
next = elem->next_;
Delete<TracedBuffer>(elem);
*head = elem = next;
break;
default:
abort();
}
} else {
break;
}
}
}
void TracedBuffer::Shutdown(TracedBuffer** head, void* remaining,
grpc_error* shutdown_err) {
GPR_DEBUG_ASSERT(head != nullptr);
TracedBuffer* elem = *head;
while (elem != nullptr) {
timestamps_callback(elem->arg_, &(elem->ts_), shutdown_err);
auto* next = elem->next_;
Delete<TracedBuffer>(elem);
elem = next;
}
*head = nullptr;
if (remaining != nullptr) {
timestamps_callback(remaining, nullptr, shutdown_err);
}
GRPC_ERROR_UNREF(shutdown_err);
}
void grpc_tcp_set_write_timestamps_callback(void (*fn)(void*,
grpc_core::Timestamps*,
grpc_error* error)) {
timestamps_callback = fn;
}
} /* namespace grpc_core */
#else /* GRPC_LINUX_ERRQUEUE */
namespace grpc_core {
void grpc_tcp_set_write_timestamps_callback(void (*fn)(void*,
grpc_core::Timestamps*,
grpc_error* error)) {
gpr_log(GPR_DEBUG, "Timestamps callback is not enabled for this platform");
}
} /* namespace grpc_core */
#endif /* GRPC_LINUX_ERRQUEUE */
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